Boyfriend forced to watch me being used

I live with my mom, who is a police station commander. My dad had passed away a few years ago, so it was just the two of us. She was on duty tonight and I didn’t expect her till late the next morning. I was used to staying the night alone, as mom has frequent night shifts. We lived in an upmarket area which was quiet and not prone to break-ins, additionally we had adequate security measures in place so I felt fairly safe.
It was late Friday night, around 11pm. My boyfriend had come over to stay the night, which he regularly does when mom is on night shift. We were watching a movie on TV, snuggled up to each other, with my head on his chest. It was rather hot and humid this night, which was not particularly unusual. I was wearing a long and oversized t-shirt, and that was it, no underwear whatsoever. My boyfriend had on a pair of shorts and a t-shirt.
A hot sex scene started on the movie we had been watching, and I could feel my boyfriend’s hand move from my lower back to my ass. I looked up to him and watched as he tentatively observed the couple on screen in a fiery, passionate, love making session. I loved my boyfriend a lot, and I knew he loved me too. I would do anything to make him happy, and he does also. I slipped my warm, soft hand into his shorts and grabbed his semi-erect cock. He looked at me and gave me a mischievous smile that just made me melt. He put his free hand on the side of my face and lowered his own, placing his soft lips on mine and kissed me slowly, while moving his hand to my neck. I pressed my tongue on his lips and they parted, allowing me to slide my tongue in his mouth. Our tongues met and we started to play with each other’s tongues. His cock was hard and ridged, now fully erect. I was also horny now and I could feel that my pussy is wet. I put my leg on him to get more comfortable, but also to allow him easier access to my pussy. His arm around me, and hand still on my ass cheek, but now he had enough room to manoeuvre his fingers to my dripping wet hole. I wanted it bad, and I guess he knew it because he shoved his middle finger deep inside my pussy, sending shivers up my spine. He began to finger fuck me, and I stroked his cock while sucking on his neck.
We were just getting up to go to the bedroom, when the door flung open and four big black men barged in. They all had guns and pointed it at us. “Take whatever you want, and leave”, I shouted. Two of the men walked toward us, one of them gripped my boyfriend and the other gripped me. They tied us up and joined the others and ransacked through the house, gathering all the valuables. They came back down with a bag full of goods, which I guessed to be moms and my jewellery, together with numerous valuable items. Mom collected expensive pieces of art. But all that didn’t matter, because everything in the house was insured, I just wanted them to leave. They had other plans, though. Two guys came and grabbed us and carried my boyfriend and me upstairs into the master bedroom, which was my moms. The guy that was laying on mom’s bed sprung up, untied me, sat back down and ordered me to get undressed. It appeared that he was the leader of the group. “No way, get the fuck out of here, my mom is a cop and will be back soon”, I said, trying to sound confident. “Look here missy, we know who your mother is, and we also know she’s not going to be back anytime soon, so be a good little girl and do as you are asked, and no one will get hurt”, said the leader. “Just leave please, take everything and go”, I said, this time sounding like the scared little 17 year old girl I was. I looked over at my boyfriend who was gagged and tied, and had a pistol pointed at his head. The guy holding him hit him across the face with the bottom of the gun.